Cap spinning apparatus



NOV. 11, 1941. w. KMPTQN 2,262,145

CAP SP INNING APPARATUS Original Filed July 2 1940 Patented Nov. 11,1941 CAP SPINNING APPARATUS William Harry Kimpton, Spondon, near l)erby, England, assignor to Celanese Corporation of America, acorporation of Delaware Original application July 2, 1940, Serial No.343,535. Divided and this application February 28, 1941, Serial No.381,003. In Great Britain July 19, 1939 3 Claims.

This invention relates to improvements in or relating to cap-spinningapparatus, this application being divided from U. S. patent applicationNo. 343,535, filed July 2, 1940.

According to the invention, the throwing-on of the yarn in starting up acap-spinning operation is facilitated by means of a notched disc restingon and supported by the spindle below the bobbin, the notches runningangularly from the periphery of the disc to receive the thread presentedto the disc and containing means to grip firmly the thread pulled into anotch. As the thread is thus picked up by the disc rotating with thespindle, it becomes attached to the bobbin to enable winding to start;and the tail of thread extending below the disc is cleanly broken away.

The means for gripping the thread may consist of soft rubber padsconfined in recesses in which the notches terminate. Centrifugal forcepresses the pads outwards in their recesses, so that as the thread ispulled between a pad and the edge of the recess containing the pad it isfirmly gripped.

The breaking away of the tail of yarn is particularly important in thecap spinning of threads of artificial filaments, such as celluloseacetate threads, since the high speed at which such threads are usuallydelivered to the cap spindles in the course of their manufacture makesmanual severance close to the bobbin exceedingly difficult, and longlengths of lashing tails are frequently produced.

The rubber pads may conveniently be held in place in their recesses bymeans of plates secured to the faces of the disc so as to cover therecesses except for portions near the periphery of the disc sufficientto permit the entry of the thread to be gripped by the pads. The edge ofthe disc and the tips of the nibs formed by the notches are smoothed soasnot to endanger the fingers of the operative. The disc may be recessedso as to engage driving lugs on the spinclle.

The invention will be described in greater detail with reference to theaccompanying drawing in which- Figure 1 is a plan view of thethrowing-on device;

Figure 2 is a part cross-sectional elevation of the device to a largerscale; and

Figure 3 shows a side elevation of the device in operative positionbelow a cap bobbin.

Referring to Figures 1 and 2, the throwing-on disc 22 comprises acentral plate, slightly larger than the bottom flange 24 of the bobbin 9(see Figure 3), the edge of the plate 23 being notched acutely, as shownat 25, each notch ending in a circular gap 26 filled by a soft rubberdisc 21. The several discs 21 are held in place by outer plates 28secured to the disc 23 and partially overlapping the recesses 26.

The disc 22 being positioned below a bobbin 9 as shown in Figure 3, thedisc rotates with the bobbin so that when a thread is presented to thedisc it enters one of the notches 25 and is drawn between the rubber pad21 and the side of the recesses 26 into which the notch leads, andcentrifugal force causes the pad to grip the thread firmly. When, as isusual, a loop is formed in the thread to be thrown-on, one limb of theloop enters the notch and the rotation of the disc 23 so tensions theother limb of the loop that it breaks and the thread gripped by the discbegins to wind on the bobbin.

Having described my invention, what I desire to secure by LettersPatents is:

1. A throwing-on device for cap-spinning apparatus, said devicecomprising a disc adapted to rest on and be rotated by the spindle belowthe bobbin, notches running angularly from the periphery of the disc toreceive a thread presented to the disc, and resilient means in thenotches to grip thread received in any notch.

2. A throwing-on device for cap-spinning apparatus, said devicecomprising a disc adapted to rest on and be rotated by the spindle belowthe bobbin, notches running angularly from the periphery of the disc toreceive a thread presented to the disc and terminating in recesses, andsoft rubber pads confined in the recesses to grip thread received in anynotch.

3. A throwing-on device for cap-spinning apparatus, said devicecomprising a disc adapted to rest on and be rotated by the spindle belowthe bobbin, notches running angularly from the periphery of the disc toreceive a thread presented to the disc and terminating in recesses, softrubber pads confined in the recesses to grip thread received in anynotch, and outer plates secured to the disc so as to partially overlapthe recesses for the purpose of securing the rubber pads.

WILLIAM HARRY KIMPTON.

